Tractor power lift row marker



Oct. 31, 1939. J. c. ROBINSON 7 4 TRACTOR POWER LIFT ROW MARKER Filed July 9, 1937 2 Sheets-Sheet 1 JAMES .0. Aos/Mso/v V INVENTOR.

ATTORNEYS.

Oct. 31, 1939. J. c. ROBINSON TRACTOR POWER LIFT ROW MARKER '2 Sheetssheet 2 Filed July 9, 1957 ATTORNEYS.

Patented Oct. 31, 1 939 TRACTOR POWER LIFTBOWMABKEB James C. Robinson, P aducah, Tex.

' Application. 9,1937, S6118] N0. 152,831

lCllim.

. This invention relates to a power operated marker designed for attachment to farm tractors, the primary object of the invention being to provide a device of this character which will mark the field during the planting operation, and one.

With the foregoing and other objects in view,

which will appear as the description proceeds,

the invention resides in the combination and arrangement of parts and in. the details of con-.

struction hereinafter described and claimed, it

being understood that changes in the precise embodiment of the invention herein described, may

be made within the scope of what is claimed,

without departing from the spirit of the invention.

Referring to the drawings:

Figure 1 is a perspective view of a tractor operatedplanter, equipped with a power marker, constructed in accordance with the invention.

Figure 2 is an enlarged perspective view illustrating a marker at one side of the planter, as moved to its active position.

Figure 3 is a diagrammatic view illustrating the marker operating mechanism as connected with the usual plow operating shaft of the planter.

Referring to the drawings in detail, the reference character 5 designates one of the main bars of the frame of the tractor operated planter, and the reference character 6 designates the tractor, which is supported by the rear wheels I and front wheels 8.

The bar 5, provides a support for the plow beams ,9, which are pivotdly mounted thereon, as shown by the drawings.

The plows, which are indicated by the reference character l0, and which operate at a point in advance of the delivery spouts of the feed hoppers II, have connection with the operating bar. 12, which forms a part of the usual planter construction. Pivotally mounted directly above the bar I2, is a shaft ii that has its ends mounted in bearings formed in the plates l4 that are supported by the frame M of the planter.

The shaft I3 is power operated, and receives,

its motion through the chain" ii that in turn is operated by a suitable socket not shown, and

which forms a part of the usual power operated planter. Securedto the shaft I3, is a bell crank lever [6 to which one end of the chain I! is connected, the opposite end of the chain being provided with a ring l8 that encircles the bar l2. 5 An arm indicated by the reference character I2 is also secured to the shaft l3, and has an opening through which the link 22 extends, the link having connection with the chain 2i, that in turn is providedwith a ring member 22 that is positioned over the bar l2, as clearly shown by -Figure 3 of the drawings.

Thus it will be seen-that due to this construction, the shaft I! will operate to swing the bell crank lever I6 and arm ll vertically, with the result that the chains I1 and 2| will act to lift or lower the shaft l2, thereby controlling the operation of the plows II, to their active or inactive positions. v

The markers, which are indicated by the reference character 23 are secured to opposite sides of the frame of the machine, each marker including a pair of plates 24 that are secured to the opposite sides of the arm 2!, the plates 24 having pivotal connection with the bar 8 of the frame of the machine, at 26.

At the outer ends of the arms 25 of the markers, are curved marker plows 21, and spring guide arms 28 :the latter arms being secured to the forward surfaces of the arms 25, the arms 28 being designed to ride over the ground surface and limit the depth of operation of the curved marker plows 21.

These pivoted markers, are operatedby means of the cables or flexible members 29, which operate over the pulleys v30, mounted at the upper ends of the frame II, which is secured to the frame of the machine in any suitable and well known manner.

As shown, this frame 2i extends upwardly, to a point an appreciable distance above the machine.

The markeroperating mechanism also includes a shaft 32 mounted in bearings 33 that are secured to the frame at 34. Secured to the shaft 32, are arms 36 to which rods 35 are connected, the rods 35 being also connected with the bell crank levers I6, as shown by Figure 3. While I have shown and described only one of these bell crank levers l6 and one of the arms i9, it is to be understood that there is an arm is at the opposite end of the shaft l3, and a bell crank lever it connected with the arm 36 at the opposite end of the shaft 32, by a rod 25, not shown.

Connectedwith the arms 26, are arms 21 to 56 which the arms SI are connected, the arms I being disposed at right angles with respect to the arms 81. Pulleys indicated by the reference character II are secured to the free ends of the arms I! and are positioned so that the cables or flexible members 10, extend therethrough.

Thus it will be seen that when the operator of the machine operates the mechanism to cause the shaft II to rotate, the plows II will be elevated, and the free ends of the arms ll will be moved downwardly, causing the cables ll to pull upwardly on the arms 2l,,raising the markers from their contact with the ground surface.

It will also be seen that this operation takes place simultaneously with the movement of the plows to their inactive positions. It will of course be understood that as the plows II are returned to their active positions, the markers will also be returned to contact with the ground surface and accomplish the purpose of the invention.

Having thus described the invention, what is claimed is:

In a motor driven planter, a frame, pivoted plow beams mounted. on the frame, markers pivotally mounted on the frame, a power shaft mounted on the frame, a bar connecting the plow beams, a shaft adapted to be rocked supported above the power shaft, an operating armsecured to the rockable shaft, a bell crank lever mounted on the power shaft, a chain connecting the bell crank lever and the bar, a rod connecting the bell crank lever and operating arm whereby movement of the power shaft rocks the rockable shaft,

and means including flexible members associated with the rockable shaft and the markers for moving the markers through movement of the rockable shaft.

JAMES c. nonmsou. so 

